I don't know what you consider to be reasonable prices... but to get reasonable sound I would recommend starting out with a Shure SM-58 dynamic mic which go for about 100 or so last I checked. If you have a little more than thatI would recommend getting a condenser mic which would cost a little more but the sound would be much clearer and crisp. Next you would need a wind screen so you do not get that clipping sound whenever you say your S's or P's and what not.
To use these two pieces of gear effectively you would need an audio interface to get the sound into your computer at a high sample rate. You can get something like a Presonus Inspire for around 180. To be able to get your voice eq'd right then you would need some monitor headphones... you can get a pair for about 40. For ones that will give you a more true sound then it would cost around 100 for a pair.
If you have trouble with any of the terminology, get a book and start readinp
... good like bro, keep doing it.